Passed: openssl/openssl#35593 (OpenSSL_1_1_1-stable - 35bb0e4)

[Travis CI]

Build Update for openssl/openssl
-------------------------------------

Build: #35593
Status: Passed

Duration: 41 mins and 2 secs
Commit: 35bb0e4 (OpenSSL_1_1_1-stable)
Author: Nicola Tuveri
Message: Refactor BN_R_NO_INVERSE logic in internal functions

Closes #12129

As described in https://github.com/openssl/openssl/issues/12129 the
readability of the internal functions providing the two alternative
implementations for `BN_mod_inverse()` is a bit lacking.

Both these functions are now completely internal, so we have the
flexibility needed to slightly improve readability and remove
unnecessary NULL checks.

The main changes here are:
- rename `BN_mod_inverse_no_branch()` as `bn_mod_inverse_no_branch()`:
  this function is `static` so it is not even visible within the rest of
  libcrypto. By convention upcase prefixes are reserved for public
  functions.
- remove `if (pnoinv == NULL)` checks in `int_bn_mod_inverse()`: this
  function is internal to the BN module and we can guarantee that all
  callers pass non-NULL arguments.
- `bn_mod_inverse_no_branch()` takes an extra `int *pnoinv` argument, so
  that it can signal if no inverse exists for the given inputs: in this
  way the caller is in charge of raising `BN_R_NO_INVERSE` as it is the
  case for the non-consttime implementation of `int_bn_mod_inverse()`.
- `BN_mod_inverse()` is a public function and must guarantee that the
  internal functions providing the actual implementation receive valid
  arguments. If the caller passes a NULL `BN_CTX` we create a temporary
  one for internal use.
- reorder function definitions in `crypto/bn/bn_gcd.c` to avoid forward
  declaration of `static` functions (in preparation for inlining)
- inline `bn_mod_inverse_no_branch()`.

(Backport to 1.1.1 from https://github.com/openssl/openssl/pull/12142)
(cherry picked from commit 5d8b3a3ef2941b8822523742a0408ca6896aa65d)

Reviewed-by: Tomas Mraz <tmraz at fedoraproject.org>
(Merged from https://github.com/openssl/openssl/pull/12169)

View the changeset: https://github.com/openssl/openssl/compare/4dcfdfce93d6...35bb0e44c616

View the full build log and details: https://travis-ci.com/github/openssl/openssl/builds/172379850?utm_medium=notification&utm_source=email

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